Update git submodules

* Update docs/submodules/releng/builder from branch 'master'
  to 4672451255ec3c82e1782e5abc6f0b7e246d1d13
  - Split mvn-verify jobs inte separate job-group

    mvn-verify jobs expect java-version variable to be a list of strings
    whereas all the other jobs just expect a single string. This becomes
    problematic when used together so split them out.

    This allows us to create job-groups for the odl-maven-jobs that are
    JDK specific so that projects can more easily choose their release
    job jdk versions.

    Change-Id: I073174d6c615d3d01a771d47f281f6687d30e575
    Signed-off-by: Thanh Ha <zxiiro@gmail.com>

diff --git a/docs/submodules/releng/builder b/docs/submodules/releng/builder
index 6296d9910277f5fcc25862cb417e1d8c2fedeff8..4672451255ec3c82e1782e5abc6f0b7e246d1d13 160000 (submodule)
--- a/docs/submodules/releng/builder
+++ b/docs/submodules/releng/builder
@@ -1 +1 @@
-Subproject commit 6296d9910277f5fcc25862cb417e1d8c2fedeff8
+Subproject commit 4672451255ec3c82e1782e5abc6f0b7e246d1d13